XMM-Newton
Users Handbook

The OM team, under the auspices of the SSC, produces a catalogue of sources
detected by the Optical Monitor. This catalogue, like the EPIC catalogue, is
based on the pipeline processed products.

The second version of the XMM-Newton OM Serendipitous Ultraviolet Source Survey
Catalogue (XMM-SUSS2) was released in March 2014. In addition to covering a
larger observation period (2000-2012), this release differs from the first
one by inclusion of all detected sources in the OM visible filters, in addition
ot the UV filters, and by performing source detection on stacked images facilitating
the detection of fainter sources.

The second release of the XMM OM Serendipitous Ultraviolet Source Survey
catalogue has been updated with the inclusion of observations performed during
2013 (XMM-SUSS2.1).

The number of observations included in the catalogue is now 7,170. The total
number of entries in this updated release is 6,246,432. They correspond to
4,329,363 sources, of which 831,582 have been observed more than once, thus
allowing variability studies.

The XMM-SUSS2 catalogue can be accessed through the XSA search interface.
Further, either the complete catalogue or a reduced version of it can be
downloaded from the XSA.